Question

What cause a rainbow?
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Answer 1

Answer:

A rainbow is caused by sunlight and atmospheric conditions. Light enters a water droplet, slowing down and bending as it goes from air to denser water. The light reflects off the inside of the droplet, separating into its component wavelengths--or colors. ... Rainbows are among the most beautiful of nature's displays.

Answer 2

Explanation:

Rainbows only exist in the presence of water and are most frequently seen after a rain. Rainbows are formed when light shines through water, like when the sun shines through the rain. This light is bent and reflected, like a reflection in a mirror, and this causes all of the amazing colors that you see.